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  • django m2m how can i get m2m table elements in a view

    - by dana
    i have a model using m2m feature: class Classroom(models.Model): user = models.ForeignKey(User, related_name = 'classroom_creator') classname = models.CharField(max_length=140, unique = True) date = models.DateTimeField(auto_now=True) open_class = models.BooleanField(default=True) members = models.ManyToManyField(User,related_name="list of invited members", through = 'Membership') and i want to take all members of one class in a view and display them using the template system. In the view, i'm trying to take all the members from a classroom like that: def inside_classroom(request,classname): try: theclass = Classroom.objects.get(classname = classname) members = Members.objects.all() etc but it doesn't work,(though the db_table is named Classroom_Members) i guess i have to use another query for getting all the members from the classroom classname. also, i want to verify if the request.user is a member using (if request.user in members) how can i het those members? Thanks in advance!

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  • Ruby get inheriting class

    - by Brian D.
    I'm working on creating my first plugin for rails. I'm still pretty new to ruby and I was wondering if its possible to get the inheriting class? For example, I'm trying to create a plugin that will allow unit testing and functional testing when you are not using migrations. What I'm trying to do is initialize a class variable named controller to be initialized to the type of controller that is being tested. If I have a base class ControllerTest: class ControllerTest < Test::Unit::TestCase attr_accessor :controller def initialize super @controller = "call function that will find the inheriting classes name and create an instance of that controller type." end end So what I'm currently stuck on is getting the name of the inheriting class. Is this possible? And if not, does anyone know another way on how I could go about implementing this? Thanks in advance.

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  • How can I pipe a large amount of data as a runtime argument?

    - by Zombies
    Running an executable JAR on a linux platform here. The program it self works on a somewhat large amount of data, basically a list of URLs... could be up to 2k. Currently I get this from a simple DB call. But I was thinking that instead of creating a new mode and writing SQL to get a new result set and having to redploy everytime, I could just make the program more robust by passing in the result set (the list of URLs) that need to be worked on... so, within a linux environment, is there a pain-free/simple way to get the result set and pass it in dynamically? I know file i/o is one, but it doesn't seem to be effecient because each file has to be named, as well more logic to handle grabbing the correct file, creating a file with a unique name, etc.

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  • deserialization on client sied in Domain Service

    - by ankit
    i have 2 classes. Person and Contact. Person class has property named "ContactNumber" which returns the Contact type, and this property is marked as "Datamember" for serialization. i have marked Contact type as "DAtaContract". on client side i am able to get the values, but when i try to insert a value and then do submit, i get the below exception. Failed to deserialize change-set. Failed to convert value of type 'Dictionary`2' to type 'Contact' Stack Trace is: at System.Web.Ria.DataServiceSubmitRequest.GetChangeSet(DomainService domainService) at System.Web.Ria.DataServiceSubmitRequest.Invoke(DomainService domainService) at System.Web.Ria.DataService.System.Web.IHttpHandler.ProcessRequest(HttpContext context) can anyone give me the solution ?

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  • Data retrieval error in Jquery

    - by Ben
    I'm trying to retrieve data from a php file named return that contains <?php echo 'here is a string'; ?>. I'm doing this through an html file containing ` div { color:blue; } span { color:red; } var x; $.get("return.php", function(data){ x = data; }) function showAlert() {alert(x);} $(document).ready(function(){ alert(x); }); ` When the button is clicked it retrieves and displays the code fine, but on the page loading, it displays "undefined" instead of the data in return.php. Any solutions?

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  • How to change order in ordered+persisted collection?

    - by Jaroslav Záruba
    I just need to change order of items in a (previously persisted) ordered collection... I tried simply passing the re-arranged collection to a setter: after committing a transaction the collection is gone. Then I tried to clear() the existing collection and addAll() afterwards: clear() makes persistent manager to mark all the elements as deleted. (But obviously I would like to be able to work with the collection items in the very transaction.) (The collection is not in a default fetch group, so I tried the above also with the named fetch group added into the fetch plan. No luck.) This must be the most stupid question, but I ran out of ideas and I'm stuck here two days already. I swear I googled. :(

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  • how to link table to table

    - by Niño Seymour L. Rodriguez
    I am a comsci student and I'm taking up database now. I got a problem in or should I say I dont know how to link table to table. It is not like you'll just use a foreign key and connect it to the primary key. The outcome should be like this: In the table Course there are three fields namely "course_id", "Description" and "subjects". When you click the name field Subject, a table named Subject should appear. Can you help me with this? hope you understnd my grammar, hehe..im not good in english......it will be a big help if you can answer it.........thank you po..............

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  • How to mutate rows of data frame - replacing one value with another

    - by rhh
    I'm having trouble with what I think is a basic R task. Here's my sample dataframe named 'b' Winner Color Size Tom Yellow Med Jerry Yellow Lar Jane Blue Med where items in the Winner column are factors. I'm trying to change "Tom" in the dataframe to "Tom LLC" and I can't get it done. Here's what I tried: Simple way: b$winner[b$winner=='Tom'] = as.factor('Tom LLC') but that failed with "invalid factor level, NAs generated" Next I tried a more advanced route: name_reset = function (x, y, z) { if (x$winner == y) {x$winner = z} } b = adply(b,1,name_reset,'Tom','Tom LLC') but that failed with "Error in list_to_dataframe(res, attr(.data, "split_labels")) : Results are not equal lengths" I feel I'm missing something basic. Can someone redirect me or offer suggestions on the code I wrote above? Thank you very much

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  • Import boto from local library

    - by ensnare
    I'm trying to use boto as a downloaded library, rather than installing it globally on my machine. I'm able to import boto, but when I run boto.connect_dynamodb() I get an error: ImportError: No module named dynamodb.layer2 Here's my file structure: project/ project/ __init__.py libraries/ __init__.py flask/ boto/ views/ .... modules/ __init__.py db.py .... templates/ .... static/ .... runserver.py And the contents of the relevant files as follows: project/project/modules/db.py from project.libraries import boto conn = boto.connect_dynamodb( aws_access_key_id='<YOUR_AWS_KEY_ID>', aws_secret_access_key='<YOUR_AWS_SECRET_KEY>') What am I doing wrong? Thanks in advance.

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  • Python: Dynamic attribute name generation without exec() or eval()

    - by PyNewbie27
    Hi, I'm trying to dynamically create buttons at runtime with PyQT4.7 However, this being my first python program I'm not sure how to get the functionality I want. I would like to be able to substitute a text string for an attribute name: i.e. for each in xrange(4): myname = "tab1_button%s" % each #tab1_button0, tab1_button1, tab1_button2 #self.ui.tab1_button0 = QtGui.QPushButton(self.ui.tab) <--normal code to create a named button setattr(self.ui,myname,QtGui.QPushButton(self.ui.tab)) #rewrite of line above to dynamicly generate a button #here's where I get stuck. this code isn't valid, but it shows what i want to do self.ui.gridLayout.addWidget(self.ui.%s) % myname #I need to have %s be tab1_button1, tab1_button2, etc. I know the % is for string substituion but how can I substitute the dynamically generated attribute name into that statement? I assume there's a basica language construct I'm missing that allows this. Since it's my first program, please take it easy on me ;)

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  • The C++ 'new' keyword and C

    - by Florian
    In a C header file of a library I'm using one of the variables is named 'new'. Unfortunately, I'm using this library in a C++ project and the occurence of 'new' as a variable names freaks out the compiler. I'm already using extern "C" { #include<... }, but that doesn't seem to help in this respect. Do I have to aks the library developer to change the name of that variable even though from his perspective, as a C developer, the code is absolutely fine, as 'new' is not a C keyword?

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  • Haskell Syntax: Parse Error On Input

    - by NuNu
    As part of a mini-haskell compiler that I'm writing, I have a function named app. What I want this function to do is take in these arguments epp (App e1 e2). The first step would be to evaluate e1 recursively (epp e1) and check if the output would be an error. If not then evaluate e2 and then call another function eppVals to evaluate the outputs of the calls on e1 and e2 which I defined as v1 and v2 respectively. epp (App e1 e2) | epp e1 /= Error = eppVals v1 v2 | otherwise = Error where v1 = epp e1 v2 = epp e2 <- parse error on input `=' Logically I believe what I have written so far works but I'm getting a parse error on input = where I stated above. Any idea why? My second try epp :: Exp -> Error Val epp (App e1 e2) = (eppVals v1 v2) where v1 = (epp e1) v2 = (epp e2) But now throws Couldn't match expected type Val with actual type Error Val

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  • How to select a dynamic datepicker instance in order to extend it with jQuery

    - by JaredC
    I'm trying to control positioning of a jQuery datepicker element. I like the solution offered at http://stackoverflow.com/questions/1818670/how-to-control-positioning-of-jqueryui-datepicker for overriding the _checkOffset fn: $.extend(window.DP_jQuery.datepicker,{_checkOffset:function(inst,offset,isFixed){return offset}}); However, this results in a 'window.DP_jQuery is undefined' error. Upon inspection, I can see that the DP_jQuery object in the DOM gets named with a random string, like so: DP_jQuery_123456. If I use this full name in the above code, it works wonderfully. My question is whether there's a way to exend the _checkOffset fn for a datepicker instance without knowing before-hand what the instance name is? For example, can I use some sort of wildcard to select all datepicker instances that begin with 'DP_jQuery_'? Thanks

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  • Too many open connections... Did I mess up something?

    - by Legend
    I am developing a plugin (for a Bittorrent client named Azureus programmed in Java) that lets me add peers into the current list from which it is downloading. Everything was working fine until yesterday when I started getting these weird errors: DEBUG::Thu Apr 15 10:45:40 CET 2010::org.gudy.azureus2.core3.peer.impl.control.PEPeerControlImpl::addPeer::795: Injected peer 90.35.126.126:33064 was not added - Too many connections DEBUG::Thu Apr 15 10:48:40 CET 2010::org.gudy.azureus2.core3.peer.impl.control.PEPeerControlImpl::addPeer::795: Injected peer 80.25.126.126:33064 was not added - Too many connections DEBUG::Thu Apr 15 10:52:40 CET 2010::org.gudy.azureus2.core3.peer.impl.control.PEPeerControlImpl::addPeer::795: Injected peer 90.35.126.126:33064 was not added - Too many connections I am thinking I messed up something with the TCP sockets. Does anyone know why this could be happening?

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  • Deserialization on client side in Domain Service

    - by ankit
    I have 2 classes: Person and Contact. Person class has a property named ContactNumber which returns the Contact type, and this property is marked as a DataMember for serialization. I have marked Contact type as a DataContract. On the client side I am able to get the values, but when I try to insert a value and then do submit, I get the following exception: Failed to deserialize change-set. Failed to convert value of type 'Dictionary`2' to type 'Contact' Stack Trace is: at System.Web.Ria.DataServiceSubmitRequest.GetChangeSet(DomainService domainService) at System.Web.Ria.DataServiceSubmitRequest.Invoke(DomainService domainService) at System.Web.Ria.DataService.System.Web.IHttpHandler.ProcessRequest(HttpContext context) Can anyone give me the solution ?

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  • Correctly Applying an Open Source License

    - by Johannes Rudolph
    My question consists of multiple points that are inherently related, I apologize for that. I tried splitting it up a little more, but I would keep repeating myself. What exactly is required to apply an open source license to a code base that is my Intellectual Property? A lot of Open Source projects include a full copy of the license somewhere in a root directory but do also have some sort of file header including a license description, disclaimer and a copyright notice. Is that really necessary or does it depend on the license type? If someone else contributes changes to this file, does he need to be named in the copyright notice too?

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  • Windows batch file to list folders that have a specific file in them

    - by Lee
    I'm trying to create a file that has a list of directories that have a specific file name in them. Let's say I'm trying to find directories that have a file named *.joe in them. I initially tried just a simple dir /ad *.joe > dir_list.txt , but it searches the directory names for *.joe, so no go. Then I concluded that a for loop was probably my best bet. I started with for /d /r %a in ('dir *.joe /b') do @echo %a >> dir_list.txt and it looked like it wasn't executing the dir command. I added the "usebackq", but that seems to only work for the /F command extension. Ideas?

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  • How Implement a system to determine if a milestone has been reached

    - by Luc M
    I have a table named stats player_id team_id match_date goal assist` 1 8 2010-01-01 1 1 1 8 2010-01-01 2 0 1 9 2010-01-01 0 5 ... I would like to know when a player reach a milestone (eg 100 goals, 100 assists, 500 goals...) I would like to know also when a team reach a milestone. I want to know which player or team reach 100 goals first, second, third... I thought to use triggers with tables to accumulate the totals. Table player_accumulator (and team_accumulator) table would be player_id total_goals total_assists 1 3 6 team_id total_goals total_assists 8 3 1 9 0 5 Each time a row is inserted in stats table, a trigger will insert/update player_accumulator and team_accumulator tables. This trigger could also verify if player or team has reached a milestone in milestone table containing numbers milestone 100 500 1000 ... A table player_milestone would contains milestone reached by player: player_id stat milestone date 1 goal 100 2013-04-02 1 assist 100 2012-11-19 There is a better way to implements a "milestone" ? There is an easiest way without triggers ? I'm using PostgreSQL

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  • T-SQL error object exists when separated in if/else blocks

    - by Jeff O
    I get the error: Msg 2714, Level 16, State 1, Line 16 There is already an object named '#mytemptable' in the database. There are ways around it, but wonder why this happens. Seems like SQL Server is verifying both blocks of the if/else statement? declare @choice int select @choice = 1 if @choice = 1 begin select 'MyValue = 1' AS Pick into #my_temp_table end else begin select 'MyValue <> 1' AS Pick into #my_temp_table end select * from #temptable drop table #temptable If the tables have different names, it works. Or if I create the temp table and use Insert Into... statements that works as well.

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  • Python imports by folder module

    - by colinmarc
    I have a directory structure: example.py templates/ __init__.py a.py b.py a.py and b.py have only one class, named the same as the file (because they are cheetah templates). For purely style reasons, I want to be able to import and use these classes in example.py like so: import templates t = templates.a() Right now I do that by having this in the template folder's __init__.py: __all__ = ["a", "b"] from . import * However, this seems pretty poor (and maybe superfluous), and doesn't even do what I want, as I have to use the classes like this: t = templates.a.a() Thoughts?

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  • google link for the RGBA library?

    - by Navruk
    I want google link for the RGBA library <script type='text/javascript' src='jquery.color-RGBa-patch.js'></script> This file contains /* * jQuery Color Animations */ (function(jQuery){ // We override the animation for all of these color styles jQuery.each(['backgroundColor', 'borderBottomColor', 'borderLeftColor', 'borderRightColor', 'borderTopColor', 'color', 'outlineColor'], function(i,attr){ jQuery.fx.step[attr] = function(fx){ if ( fx.colorFunction == undefined || fx.state == 0 ) { fx.start = getColor( fx.elem, attr ); fx.end = getRGB( fx.end ); if ( fx.start == undefined ) { fx.start = [ 255,255,255,0 ]; } else { if ( fx.start[3] == undefined ) // if alpha channel is not spotted fx.start[3] = 1; // assume it is fully opaque if ( fx.start[3] == 0 ) // if alpha is present and fully transparent fx.start[0] = fx.start[1] = fx.start[2] = 255; // assume starting with white } if ( fx.end[3] == undefined ) // if alpha channel is not spotted fx.end[3] = 1; // assume it is fully opaque fx.colorFunction = ( fx.start[3] == 1 && fx.end[3] == 1 ? calcRGB : calcRGBa ); } fx.elem.style[attr] = fx.colorFunction(); } }); var calcRGB = function() { return 'rgb(' + Math.max(Math.min( parseInt((this.pos * (this.end[0] - this.start[0])) + this.start[0]), 255), 0) + ',' + Math.max(Math.min( parseInt((this.pos * (this.end[1] - this.start[1])) + this.start[1]), 255), 0) + ',' + Math.max(Math.min( parseInt((this.pos * (this.end[2] - this.start[2])) + this.start[2]), 255), 0) + ')'; }; var calcRGBa = function() { return 'rgba(' + Math.max(Math.min( parseInt((this.pos * (this.end[0] - this.start[0])) + this.start[0]), 255), 0) + ',' + Math.max(Math.min( parseInt((this.pos * (this.end[1] - this.start[1])) + this.start[1]), 255), 0) + ',' + Math.max(Math.min( parseInt((this.pos * (this.end[2] - this.start[2])) + this.start[2]), 255), 0) + ',' + Math.max(Math.min( parseFloat((this.pos * (this.end[3] - this.start[3])) + this.start[3]), 1), 0) + ')'; }; // Color Conversion functions from highlightFade // By Blair Mitchelmore // http://jquery.offput.ca/highlightFade/ // Parse strings looking for color tuples [255,255,255] function getRGB(color) { var result; // Check if we're already dealing with an array of colors if ( color && color.constructor == Array && color.length >= 3 ) return color; // Look for rgb(num,num,num) if (result = /rgba?\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,?\s*((?:[0-9](?:\.[0-9]+)?)?)\s*\)/.exec(color)) return [ parseInt(result[1]), parseInt(result[2]), parseInt(result[3]), parseFloat(result[4]||1) ]; // Look for rgb(num%,num%,num%) if (result = /rgba?\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,?\s*((?:[0-9](?:\.[0-9]+)?)?)\s*\)/.exec(color)) return [parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55, parseFloat(result[4]||1)]; // Look for #a0b1c2 if (result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(color)) return [parseInt(result[1],16), parseInt(result[2],16), parseInt(result[3],16)]; // Look for #fff if (result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(color)) return [parseInt(result[1]+result[1],16), parseInt(result[2]+result[2],16), parseInt(result[3]+result[3],16)]; // Otherwise, we're most likely dealing with a named color var colorName = jQuery.trim(color).toLowerCase(); if ( colors[colorName] != undefined ) return colors[colorName]; return [ 255, 255, 255, 0 ]; } function getColor(elem, attr) { var color; do { color = jQuery.curCSS(elem, attr); // Keep going until we find an element that has color, or we hit the body if ( color != '' && color != 'transparent' || jQuery.nodeName(elem, "body") ) break; attr = "backgroundColor"; } while ( elem = elem.parentNode ); return getRGB(color); }; // Some named colors to work with // From Interface by Stefan Petre // http://interface.eyecon.ro/ var colors = { aqua:[0,255,255], azure:[240,255,255], beige:[245,245,220], black:[0,0,0], blue:[0,0,255], brown:[165,42,42], cyan:[0,255,255], darkblue:[0,0,139], darkcyan:[0,139,139], darkgrey:[169,169,169], darkgreen:[0,100,0], darkkhaki:[189,183,107], darkmagenta:[139,0,139], darkolivegreen:[85,107,47], darkorange:[255,140,0], darkorchid:[153,50,204], darkred:[139,0,0], darksalmon:[233,150,122], darkviolet:[148,0,211], fuchsia:[255,0,255], gold:[255,215,0], green:[0,128,0], indigo:[75,0,130], khaki:[240,230,140], lightblue:[173,216,230], lightcyan:[224,255,255], lightgreen:[144,238,144], lightgrey:[211,211,211], lightpink:[255,182,193], lightyellow:[255,255,224], lime:[0,255,0], magenta:[255,0,255], maroon:[128,0,0], navy:[0,0,128], olive:[128,128,0], orange:[255,165,0], pink:[255,192,203], purple:[128,0,128], violet:[128,0,128], red:[255,0,0], silver:[192,192,192], white:[255,255,255], yellow:[255,255,0] }; })(jQuery);

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  • jQuery color plugin: onMouseOver animation causes flickering in FF3.5.5

    - by rt-uk
    I'm trying to change the background color of a div on mouseover and mouseout. Instant change to yellow on MouseOver, and slow fade on MouseOut. function hilightel(keydiv) { $('#'+keydiv).animate({ backgroundColor: '#ffffd3' },1); } function lolightel(keydiv) { $('#'+keydiv).animate({ backgroundColor: '#ffffff' },300); } < div onMouseOver=javascript:highlightel('item1'); onMouseOut=javascript:lolightel('item1'); id='item1'CONTENT< /div When the mouse moves over text within the div, though, it thinks I've moused-out and so flickers badly. Alternatives that don't work: - animateToClass doesn't support background-color so I'm using the 'color' plugin - I hear that switchClass doesn't work in Chrome - Can't use .hover because their will be dynamically named divs in the page so need a general function Thanks in advance...

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  • ASP.NET - Themes and Relative Referencing

    - by user70192
    Hello, I have an ASP.NET application that uses themes. Let's pretend I have a theme named "MySkin". I have a page that is in a sub-directory of my application. When I reference a page that uses "MySkin", I noticed that ASP.NET renders a link element that walks up to the root of the site and then down into the App_Themes directory. Here is an example link element I found in a rendered ASP.NET page: <link href="../../App_Themes/MySkin/theme.css" type="text/css" rel="stylesheet" /> Is there a reason that the rendered link element does not use the following instead: <link href="/App_Themes/MySkin/theme.css" type="text/css" rel="stylesheet" /> Is this a browser compatibility issue or is there another reason? The reason I am asking is because I am rendering my ASP.NET page using Server.Execute and storing the result in a different directory. Because of this, I would prefer to use the second way to reference my theme's css. Thank you!

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  • How to enable camera feature in a sencha touch application using phonegap?

    - by Fabre
    I have developed one application in sencha touch2. I want to design a page in such a way that The page has a default image and one button below that. By clicking that button device camera should open(device mainly iPad and iPhone) and after capturing the image lets see it stored in a folder named as "capture" in your device. Then that captured image should replace that default image. I want to use Phonegap compulsorily. I have seen phone gap APIs for camera but I don't get it how to use it exactly. I am using MAC and Xcode for development.

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  • Symfony2 and RabbitMqBundle. Can`t publish a message

    - by Gabriel Filipiak
    I am trying to use syfmony2 framework with RabbitMqBundle from here: https://github.com/videlalvaro/RabbitMqBundle I am sure that my rabbitmq server is up and running and I am doing the configuration and publishers code accordingly to the docs delivered on github. Unfortunately I can`t add any message to the queue. I am sure that my rabbitmq server is up and running. I have queue named accordingly to the symfony configuration file. Have anyone got any clue what is wrong? Thanks in advance for any suggestions.

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